There is a lot of literature about entities and their purpose in Drupal 7 context. Most of it has been adopted in Drupal 8 as well. In this post, I'll highlight the differences between D7 and D8 entities and how to use the entity API in 8.
Entities have their own classes in 8. Also, Drupal 8 introduces the concept of config entities. These are used to store user-created configuration if its more than a piece of text, boolean or integer. They differ from the usual entities in the following ways:
Much like previous versions of Drupal, version 8 of the CMS revolves around the concept of Entities. These are objects that have an ID, Language, Type, and Storage. Some optional properties are URLs, Bundles, and labels. They can be viewed, loaded, created, saved, and deleted, as well as have access permissions set for them. Most things in Drupal are entities, such as Users, Nodes, or Blocks.
As I've explained Short trip on Entity API in Drupal 8 Entity is the most important thing in Drupal 8, Almost, everything is Entity. So for a Drupal developer, it should be good to have a cheat sheet of Entity API instead of googling every time he/she need something, and of course, after a while, they saved in the long-term memory of Developer.
Let's jump into summarized Drupal 8 Entity API.
